* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  font: 20px "Courier";
}
#main {
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  align-items: center;
  width: 360px;
  height: 420px;
  margin: 100px auto 10px;
  padding: 10px;
  background-color: #b7d4a8;
  border: 1px solid black;
  border-radius: 10px;
}
#main #stage {
  position: relative;
  width: 304px;
  height: 304px;
  border: 2px solid black;
}
#main #stage #snake .snake-body {
  position: absolute;
  width: 10px;
  height: 10px;
  background-color: #000;
  border: 1px solid #b7d4a8;
}
#main #stage #snake .snake-body:first-child {
  background-color: #f64408;
  border-radius: 50%;
}
#main #stage #food {
  position: absolute;
  top: 30px;
  left: 10px;
  width: 10px;
  height: 10px;
  background-color: black;
  border: 1px solid #b7d4a8;
}
#main #score-panel {
  display: flex;
  justify-content: space-between;
  width: 304px;
  margin-top: 20px;
}
#desc {
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  align-items: center;
  margin: 20px auto;
}
#desc .mt10 {
  margin-top: 10px;
}
